CN114103504B - Printing process of anti-counterfeiting traceable invisible codes and color box for printing invisible codes - Google Patents
Printing process of anti-counterfeiting traceable invisible codes and color box for printing invisible codes Download PDFInfo
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- CN114103504B CN114103504B CN202111416396.4A CN202111416396A CN114103504B CN 114103504 B CN114103504 B CN 114103504B CN 202111416396 A CN202111416396 A CN 202111416396A CN 114103504 B CN114103504 B CN 114103504B
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- 238000007639 printing Methods 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 47
- 230000008569 process Effects 0.000 title claims abstract description 39
- 239000010410 layer Substances 0.000 claims abstract description 88
- 229920000058 polyacrylate Polymers 0.000 claims abstract description 84
- 239000006229 carbon black Substances 0.000 claims abstract description 18
- 230000009477 glass transition Effects 0.000 claims abstract description 16
- 238000005507 spraying Methods 0.000 claims abstract description 15
- 239000011241 protective layer Substances 0.000 claims abstract description 10
- 238000003848 UV Light-Curing Methods 0.000 claims abstract description 3
- 239000002966 varnish Substances 0.000 claims description 34
- 239000003795 chemical substances by application Substances 0.000 claims description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- 229910052799 carbon Inorganic materials 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 9
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 4
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- DXPPIEDUBFUSEZ-UHFFFAOYSA-N 6-methylheptyl prop-2-enoate Chemical compound CC(C)CCCCCOC(=O)C=C DXPPIEDUBFUSEZ-UHFFFAOYSA-N 0.000 claims description 4
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 4
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 4
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 description 20
- 239000000839 emulsion Substances 0.000 description 16
- 239000011248 coating agent Substances 0.000 description 12
- 238000000576 coating method Methods 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 9
- 238000001723 curing Methods 0.000 description 8
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 7
- 239000012965 benzophenone Substances 0.000 description 7
- 230000002035 prolonged effect Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 239000000178 monomer Substances 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000011068 loading method Methods 0.000 description 4
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 4
- 230000006750 UV protection Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000003999 initiator Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 2
- 239000012964 benzotriazole Substances 0.000 description 2
- 239000003995 emulsifying agent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229960004889 salicylic acid Drugs 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000012612 commercial material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000004224 protection Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/14—Security printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/005—Colour cards; Painting supports; Latent or hidden images, e.g. for games; Time delayed images
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0011—Pre-treatment or treatment during printing of the recording material, e.g. heating, irradiating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0011—Pre-treatment or treatment during printing of the recording material, e.g. heating, irradiating
- B41M5/0017—Application of ink-fixing material, e.g. mordant, precipitating agent, on the substrate prior to printing, e.g. by ink-jet printing, coating or spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0082—Digital printing on bodies of particular shapes
- B41M5/0088—Digital printing on bodies of particular shapes by ink-jet printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
- B41M7/0045—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using protective coatings or film forming compositions cured by mechanical wave energy, e.g. ultrasonics, cured by electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams, or cured by magnetic or electric fields, e.g. electric discharge, plasma
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
- B41M7/0081—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
- B41M7/02—Dusting, e.g. with an anti-offset powder for obtaining raised printing such as by thermogravure ; Varnishing
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Printing Methods (AREA)
Abstract
The application relates to the field of two-dimensional codes, and particularly discloses a printing process of an anti-counterfeiting traceable invisible code and a color box for printing the invisible code. The printing process of the anti-counterfeiting traceable invisible codes comprises the following steps of: providing a carbon black free ink layer; setting a polyacrylate layer with a glass transition temperature of less than-14 ℃; selecting a variable two-dimensional code from a database system and associating information to be printed with the variable two-dimensional code; spraying invisible ink onto the polyacrylate layer according to the identification array of the variable two-dimensional code; UV curing is carried out on the invisible ink, so that an anti-counterfeiting traceable invisible code is formed; a transparent protective layer is provided. The color box printed with the invisible codes is printed with the invisible codes on the surface, and the invisible codes are printed by adopting the printing process of the anti-counterfeiting traceable invisible codes. According to the application, through the mutual matching of the polyacrylate layer with the glass transition temperature less than-14 ℃ and the transparent protective layer (the glazing oil layer), the connection firmness between the invisible ink and the printing stock is effectively improved, and thus the wear resistance of the anti-counterfeiting traceable invisible code is greatly improved.
Description
Technical Field
The application relates to the field of two-dimensional codes, in particular to a printing process of an anti-counterfeiting traceable invisible code and a color box for printing the invisible code.
Background
The invisible codes are two-dimensional codes printed by invisible ink, and the two-dimensional codes are transparent under normal light and cannot be seen by human eyes or recognized by common code scanning equipment; when the two-dimensional code is used, the two-dimensional code can be developed only by irradiation of special equipment (such as an ultraviolet lamp) and is identified by code scanning equipment; the invisible code has the advantage of good confidentiality.
The variable two-dimensional code is also called a live code, and is a high-level two-dimensional code associated with a variable two-dimensional code database system located at the cloud. The traditional two-dimensional code is a static code, information can be obtained through code scanning without networking, but the information corresponding to the traditional two-dimensional code cannot be changed; the variable two-dimensional code is associated with the background of the cloud, so that the corresponding information can be edited and modified at any time, and the information can be updated at any time. And the tracing information of the printing stock corresponding to the variable two-dimensional code can be queried by scanning the code, so that the tracing function of the product is realized. In addition, the variable two-dimensional code realizes one object and one code, and each printing stock corresponds to one variable two-dimensional code, so that the occurrence of counterfeit goods can be effectively reduced, and the anti-counterfeiting and anti-channeling advantages are realized.
In intensive studies, the inventors found that: the variable two-dimensional code technology is combined with the invisible ink, so that the obtained invisible two-dimensional code has the characteristics of anti-counterfeiting and traceability, has good confidentiality, and can greatly improve the usability of the two-dimensional code.
However, compared with the traditional two-dimensional code, the variable two-dimensional code has longer service cycle, so that higher requirements on the wear resistance are provided. Accordingly, the inventors consider that: for anti-counterfeiting traceable invisible codes (namely invisible variable two-dimensional codes), the improvement of wear resistance is a subject to be studied.
Disclosure of Invention
In order to improve the wear resistance of the anti-counterfeiting traceable invisible codes, the application provides a printing process of the anti-counterfeiting traceable invisible codes and a color box for printing the invisible codes.
In a first aspect, a printing process of an anti-counterfeiting traceable invisible code is provided, and the following technical scheme is adopted:
The printing process of the anti-counterfeiting traceable invisible codes comprises the following steps of:
arranging a carbon black-free ink layer on a printing stock;
Arranging a polyacrylate layer on the carbon black-free ink layer, wherein the glass transition temperature of the polyacrylate is less than-14 ℃;
Selecting a variable two-dimensional code from a database system and connecting information to be printed with the variable two-dimensional code through software or an operating system;
Spraying invisible ink onto the polyacrylate layer of the printing stock according to the identification array of the variable two-dimensional code;
UV curing is carried out on the invisible ink sprayed on the polyacrylate layer, so that an anti-counterfeiting traceable invisible code is formed;
And a transparent protective layer is arranged on the anti-counterfeiting traceable invisible code.
By adopting the technical scheme, the wear resistance of the invisible codes is improved. The polyacrylate with the glass transition temperature less than-14 ℃ is dried and formed into a film to form a polyacrylate layer, and the film layer has certain adhesiveness, so that the invisible ink is adhered, the invisible ink can be connected to the polyacrylate layer, and the connection firmness between an invisible code formed by the invisible ink and a printing stock is improved; meanwhile, the transparent protective layer also has the function of protecting the invisible codes; therefore, the polyacrylate layer and the transparent protective layer are matched with each other, so that the wear resistance of the invisible codes can be greatly improved.
Alternatively, the carbon black-free ink is formulated with a red carbon black-free ink, a blue carbon black-free ink, and a yellow carbon black-free ink.
By adopting the technical scheme, the adoption of the carbon black-free ink can greatly reduce the residue of carbon black on the invisible codes, thereby reducing the possibility of interference of code scanning identification.
Optionally, the mass ratio of the red non-carbon black ink, the blue non-carbon black ink and the yellow non-carbon black ink is 1:1:1.
Optionally, the invisible ink is sprayed onto a printing stock through a code spraying device at a spraying speed of 20-50 m/min, and then the invisible ink is solidified through irradiation of a 6000-7000W UV lamp, so that the thickness of the obtained anti-counterfeiting traceable invisible code is 2-4 mu m.
By adopting the technical scheme, the technological parameters of invisible ink spraying and curing are optimized, so that the invisible code with better performance can be obtained.
Optionally, the transparent protective layer is a glazing oil layer, and the glazing oil is UV glazing oil and contains an ultraviolet resistant agent.
By adopting the technical scheme, the polishing oil is an oil agent capable of increasing glossiness, wear resistance and water resistance; the mutual coordination of the glazing oil layer and the polyacrylate layer can play a good role in protecting the invisible codes, and the wear resistance of the invisible codes can be improved. Meanwhile, the ultraviolet resistance agent is added into the varnish, so that the ultraviolet resistance damage capability of the varnish and the invisible codes can be improved, and the service life of the invisible codes is prolonged.
Optionally, the varnish is coated on the anti-counterfeiting traceable invisible codes according to the amount of 5-8 g/m 2, and is cured by irradiation of 3500-4500W of UV lamps.
By adopting the technical scheme, the process parameters of the coating and curing of the varnish are optimized, so that the various performances of the varnish layer are improved.
Optionally, the glass transition temperature of the polyacrylate is-38 to-24 ℃.
By adopting the technical scheme, the glass transition temperature of the polyacrylate is optimized, so that the polyacrylate has ideal adhesiveness, and the problem that the polyacrylate influences the coating uniformity of the varnish due to overhigh adhesiveness is solved, thereby being beneficial to obtaining more excellent wear resistance of invisible codes.
Optionally, the polyacrylate is polymerized by isooctyl acrylate, n-butyl acrylate, methyl methacrylate, 2-ethylhexyl acrylate, acrylamide and acrylic acid.
Optionally, the polyacrylate layer contains an ultraviolet resistant agent.
By adopting the technical scheme, the polyacrylate layer has good ultraviolet resistance, so that the damage of ultraviolet rays to the polyacrylate layer in the subsequent preparation and use is reduced, the service life of the polyacrylate layer is prolonged, and the service life of the invisible code is prolonged.
In a second aspect, a color box is provided, and the following technical scheme is adopted:
the color box is printed with invisible codes on the surface, and the invisible codes are printed by adopting the printing process of the anti-counterfeiting traceable invisible codes.
By adopting the technical scheme, the color box and the information of the contained objects thereof have better anti-counterfeiting performance, traceability and confidentiality. Meanwhile, the invisible codes are firmly connected with the color box, so that the time for playing the roles of the invisible codes is prolonged.
In summary, the present application has at least one of the following advantages:
1. according to the application, through the matching of the variable two-dimensional code technology and the invisible ink, the invisible code with anti-counterfeiting property, traceability and high confidentiality is obtained, and the usability of the two-dimensional code is improved.
2. According to the application, through the mutual matching of the polyacrylate layer with the glass transition temperature less than-14 ℃ and the transparent protective layer (the glazing oil layer), the connection firmness between the invisible ink and the printing stock is effectively improved, and thus the wear resistance of the anti-counterfeiting traceable invisible code is greatly improved. The polyacrylate film layer with glass transition temperature lower than-14 deg.c has the features of softness and adhesion, and is favorable to adhering invisible ink to raise the connection between invisible ink and printed matter.
3. The application reduces the residual carbon black on the invisible codes by adopting the ink without carbon black, thereby being capable of reducing the problem that the code scanning identification is interfered.
4. According to the application, the ultraviolet resistant agent is arranged in the varnish layer and the polyacrylate layer, so that the possibility that the polyacrylate layer, the invisible codes and the varnish layer are damaged by ultraviolet rays is reduced, and the service life of the whole invisible codes is prolonged.
5. The color box has the advantages that the surface is printed with the anti-counterfeiting traceable invisible codes, so that the color box and the information of the object to be contained have better anti-counterfeiting performance, traceability and confidentiality. Meanwhile, the invisible codes are firmly connected with the color box, so that the time for playing the roles of the invisible codes is prolonged.
Detailed Description
Through the combination of the variable two-dimensional code and the invisible ink, the invisible code with the characteristics of anti-counterfeiting property, traceability, high confidentiality and the like can be obtained, and the two-dimensional code is beneficial to better serving people. However, compared with a static two-dimensional code, the service cycle of the variable two-dimensional code is longer, so that higher requirements are put on the wear resistance of the invisible code. After the polyacrylate with the glass transition temperature less than-14 ℃ is dried to form a film, the film layer has the characteristics of softness and adhesiveness, and is favorable for fixing the invisible codes, thereby being favorable for improving the wear resistance of the invisible codes. The application is based on this.
The present application will be described in further detail with reference to examples.
The relevant equipment used in the preparation examples, examples and comparative examples are all commercially available conventional equipment; the relevant raw materials used are all commercial materials. The varnish was purchased from tin dragon ink works in tin-free market.
Preparation example 1
The preparation method of the polyacrylate emulsion comprises the following steps:
S01, weighing the following six reaction monomers: 35kg of isooctyl acrylate, 20kg of n-butyl acrylate, 27kg of methyl methacrylate, 5kg of 2-ethylhexyl acrylate, 5kg of acrylamide and 8kg of acrylic acid are uniformly mixed to obtain a mixed monomer; meanwhile, 4g of sodium dodecyl sulfate as an emulsifier and 0.5kg of sodium persulfate as an initiator were weighed.
S02, introducing 100kg of water into the reaction kettle, heating to 30 ℃, sequentially adding the emulsifier and 10wt% of mixed monomer, and uniformly mixing.
S03, heating the mixed system to 76 ℃, adding 25wt% of initiator, and stirring for 30min.
S04, heating the mixed system to 80 ℃, and then dropwise adding the rest mixed monomer and the initiator for 4 hours.
S05, keeping the temperature of the mixed system at 86 ℃ and reacting for 2 hours at constant temperature.
S06, cooling the mixed system to room temperature, adding ammonia water to neutralize to neutrality, and filtering with 120-mesh gauze to obtain polyacrylate emulsion; the emulsion had a solids content of 47% and the polyacrylate had a glass transition temperature of-14.6 ℃.
PREPARATION EXAMPLES 2 to 5
Preparation examples 2 to 5 are substantially the same as preparation example 1 except that: the composition of the six reaction monomers was varied and is shown in Table 1.
TABLE 1 composition of the six reactive monomers in preparation examples 1-5
| Project | Preparation example 1 | Preparation example 2 | Preparation example 3 | Preparation example 4 | Preparation example 5 |
| Isooctyl acrylate/kg | 35 | 40 | 42 | 45 | 43 |
| N-butyl acrylate/kg | 20 | 18 | 23 | 25 | 27 |
| Methyl methacrylate/kg | 27 | 18 | 20 | 15 | 12 |
| 2-Ethylhexyl acrylate/kg | 5 | 12 | 8 | 10 | 16 |
| Acrylamide/kg | 5 | 6 | 4 | 3 | 2 |
| Acrylic acid/kg | 8 | 6 | 3 | 2 | 2 |
| Solids content/% | 47 | 48 | 47 | 47 | 48 |
| Glass transition temperature/DEGC | -14.6 | -24.0 | -30.6 | -38.1 | -44.3 |
Example 1
The embodiment discloses a printing process of an anti-counterfeiting traceable invisible code, which comprises the following steps:
S1, taking a red non-carbon black ink, a blue non-carbon black ink and a yellow non-carbon black ink according to the weight ratio of 1:1:1, uniformly coating the non-carbon black ink on a printing material (specifically, the outer surface of a color box in the embodiment) through an offset press; drying to form a carbon black-free ink layer, and controlling the thickness of the carbon black-free ink layer to be 1 μm.
S2, taking the polyacrylate emulsion obtained in the preparation example 1, adding an ultraviolet resistant agent with the mass of 1.5wt% into the polyacrylate emulsion, uniformly mixing the polyacrylate emulsion and the ultraviolet resistant agent, and uniformly coating the mixture on the carbon black-free ink layer through an offset press; drying at 50 ℃ to form a polyacrylate layer, wherein the thickness of the polyacrylate layer is controlled to be 1 mu m. The anti-ultraviolet agent can be benzophenone, benzotriazole or salicylic acid anti-ultraviolet agent; in this embodiment, the anti-UV agent is UV-531 of the benzophenone type.
S3, selecting unused variable two-dimension codes from a variable two-dimension code database system positioned at the cloud, inputting information of a printing stock to be printed into a database through an operating system (software, app and the like) and associating the information with the variable two-dimension codes, and realizing the coding of the printing stock.
S4, taking invisible ink, loading the invisible ink into a code spraying machine, and simultaneously inputting identification array data of the variable two-dimensional code into a spray head controller of the code spraying machine; the invisible ink is sprayed out through a spray head of the ink jet printer and sprayed to the corresponding position of the polyacrylate layer according to the identification array data; the speed of jet printing was controlled to be 30m/min.
In the embodiment, the invisible ink is UV-curable invisible fluorescent ink, contains 5wt% of colorless fluorescent powder, has the characteristics of transparency under normal light and color development under 356nm ultraviolet light, and has the advantage of easy fusion.
S5, placing the printing stock under a UV lamp with the power of 6500W for irradiation, and curing the invisible ink under the irradiation of ultraviolet light to form an invisible variable two-dimensional code; because the variable two-dimensional code has the characteristic of anti-counterfeiting traceability, namely the anti-counterfeiting traceability invisible code is formed on the printing stock, and the thickness of the invisible code is controlled to be 3 mu m.
S6, coating UV varnish on the invisible codes (comprising the polyacrylate layer which is not covered by the invisible codes and is exposed) by an offset press according to the amount of 6g/m 2; and then the printing stock is irradiated under a 4000W UV lamp, so that the UV varnish is solidified to form a varnish layer (namely a transparent protective layer), the area of the varnish layer is controlled to be larger than that of the polyacrylate layer, and the polyacrylate layer is completely covered.
Wherein, the UV varnish contains 1 weight percent of ultraviolet resistant agent; the anti-ultraviolet agent can be benzophenone, benzotriazole or salicylic acid anti-ultraviolet agent; in this embodiment, the anti-UV agent is UV-531 of the benzophenone type.
When in use, the invisible codes are irradiated by an ultraviolet light source to develop colors; and then identifying the invisible code through equipment (such as a smart phone) with a two-dimensional code identification function to obtain information of the printing stock. The invisible codes obtained through the printing process of the embodiment have the advantages of anti-counterfeiting performance, traceability, confidentiality and the like, and due to the arrangement of the polyacrylate layer and the glazing oil layer, the invisible codes have excellent wear resistance, and the service life of the invisible codes is prolonged.
The embodiment also discloses a color box, and the outer surface of the color box is printed with an invisible code (invisible variable two-dimensional code) by adopting the printing process of the anti-counterfeiting traceable invisible code. By printing the invisible codes, the color box and the information of the contained objects can be obtained, and the information has anti-counterfeiting property, traceability and confidentiality. Meanwhile, the connection firmness between the invisible codes and the color box is good, and the invisible codes can play a role for a longer time.
Example 2
This embodiment is substantially the same as embodiment 1 except that: in this embodiment, the polyacrylate emulsion obtained in preparation example 2 is used in the printing process of the anti-counterfeiting traceable invisible codes.
Example 3
This embodiment is substantially the same as embodiment 1 except that: in this embodiment, the polyacrylate emulsion obtained in preparation example 3 is used in the printing process of the anti-counterfeiting traceable invisible codes.
Example 4
This embodiment is substantially the same as embodiment 1 except that: in this embodiment, the polyacrylate emulsion obtained in preparation example 4 is used in the printing process of the anti-counterfeiting traceable invisible codes.
Example 5
This embodiment is substantially the same as embodiment 1 except that: in this embodiment, the polyacrylate emulsion obtained in preparation example 5 is used in the printing process of the anti-counterfeiting traceable invisible codes.
Example 6
This embodiment is substantially the same as embodiment 3, except that: in this embodiment, in the printing process of the anti-counterfeiting traceable invisible code, a part of control parameters in S2 are changed.
The method comprises the following steps:
S2, taking the polyacrylate emulsion obtained in the preparation example 3, adding an ultraviolet resistant agent with the mass of 1.5wt% into the polyacrylate emulsion, uniformly mixing the polyacrylate emulsion and the ultraviolet resistant agent, and uniformly coating the mixture on the carbon black-free ink layer through an offset press; drying at 50 ℃ to form a polyacrylate layer, wherein the thickness of the polyacrylate layer is controlled to be 0.7 mu m. In this embodiment, the anti-UV agent is UV-531 of the benzophenone type.
Example 7
This embodiment is substantially the same as embodiment 3, except that: in this embodiment, in the printing process of the anti-counterfeiting traceable invisible code, a part of control parameters in S2 are changed.
The method comprises the following steps:
S2, taking the polyacrylate emulsion obtained in the preparation example 3, adding an ultraviolet resistant agent with the mass of 1.5wt% into the polyacrylate emulsion, uniformly mixing the polyacrylate emulsion and the ultraviolet resistant agent, and uniformly coating the mixture on the carbon black-free ink layer through an offset press; drying at 50 ℃ to form a polyacrylate layer, wherein the thickness of the polyacrylate layer is controlled to be 1.5 mu m. In this embodiment, the anti-UV agent is UV-531 of the benzophenone type.
Example 8
This embodiment is substantially the same as embodiment 3, except that: in this embodiment, in the printing process of the anti-counterfeiting traceable invisible code, a part of control parameters in S4 are changed.
The method comprises the following steps:
S4, taking invisible ink, loading the invisible ink into a code spraying machine, and simultaneously inputting the data of the variable two-dimensional code identification array into a spray head controller of the code spraying machine; the invisible ink is sprayed out through a spray head of the ink jet printer and sprayed to the corresponding position of the polyacrylate layer according to the identification array data; the jet printing speed was controlled to be 20m/min.
Example 9
This embodiment is substantially the same as embodiment 3, except that: in this embodiment, in the printing process of the anti-counterfeiting traceable invisible code, a part of control parameters in S4 are changed.
The method comprises the following steps:
s4, taking invisible ink, loading the invisible ink into a code spraying machine, and simultaneously inputting the data of the variable two-dimensional code identification array into a spray head controller of the code spraying machine; the invisible ink is sprayed out through a spray head of the ink jet printer and sprayed to the corresponding position of the polyacrylate layer according to the identification array data; the speed of the jet printing was controlled to be 50m/min.
Example 10
This embodiment is substantially the same as embodiment 3, except that: in this embodiment, in the printing process of the anti-counterfeiting traceable invisible code, a part of control parameters are changed in S5.
The method comprises the following steps:
and S5, placing the printing stock under a UV lamp with the power of 6000W, curing the invisible ink under the irradiation of ultraviolet light to form an invisible variable two-dimensional code, namely an invisible code, and controlling the thickness of the invisible code to be 2 mu m.
Example 11
This embodiment is substantially the same as embodiment 3, except that: in this embodiment, in the printing process of the anti-counterfeiting traceable invisible code, a part of control parameters are changed in S5.
The method comprises the following steps:
S5, placing the printing stock under a UV lamp with the power of 7000W, curing the invisible ink under the irradiation of ultraviolet light to form an invisible variable two-dimensional code, namely an invisible code, and controlling the thickness of the invisible code to be 4 mu m.
Example 12
This embodiment is substantially the same as embodiment 3, except that: in this embodiment, in the printing process of the anti-counterfeiting traceable invisible code, a part of control parameters are changed in S6.
The method comprises the following steps:
S6, coating UV varnish on the invisible codes (comprising the polyacrylate layer which is not covered by the invisible codes and is exposed) by an offset press according to the amount of 5g/m 2; and then the printing stock is irradiated under a 3500W UV lamp, so that the UV varnish is solidified to form a varnish layer, the area of the varnish layer is controlled to be larger than that of the polyacrylate layer, and the polyacrylate layer is completely covered.
Example 13
This embodiment is substantially the same as embodiment 3, except that: in this embodiment, in the printing process of the anti-counterfeiting traceable invisible code, a part of control parameters are changed in S6.
The method comprises the following steps:
S6, coating UV varnish on the invisible codes (comprising the polyacrylate layer which is not covered by the invisible codes and is exposed) by an offset press according to the amount of 8g/m 2; and then the printing stock is irradiated under a 4500W UV lamp, so that the UV varnish is solidified to form a varnish layer, the area of the varnish layer is controlled to be larger than that of the polyacrylate layer, and the polyacrylate layer is completely covered.
Comparative example
The comparative example is different from example 1 in that in the printing process of the anti-counterfeit traceable invisible code, the polyacrylate layer is not printed, that is, S2 is not present.
S1, taking a red non-carbon black ink, a blue non-carbon black ink and a yellow non-carbon black ink according to the weight ratio of 1:1: the carbon black-free ink prepared by mixing and blending according to the mass ratio is uniformly coated on a printing stock (the outer surface of a color box is specific in the comparative example) through an offset press; drying to form a carbon black-free ink layer, and controlling the thickness of the carbon black-free ink layer to be 1 μm.
S3, selecting unused variable two-dimension codes from a variable two-dimension code database system positioned at the cloud, inputting information of a printing stock to be printed into a database through an operating system (software, app and the like) and associating the information with the variable two-dimension codes, and realizing the coding of the printing stock.
S4, taking invisible ink, loading the invisible ink into a code spraying machine, and simultaneously inputting identification array data of the variable two-dimensional code into a spray head controller of the code spraying machine; the invisible ink is sprayed out through a spray head of the ink jet printer and sprayed to the corresponding position of the polyacrylate layer according to the identification array data; the speed of jet printing was controlled to be 30m/min.
In this example, the invisible ink was a UV curable invisible fluorescent ink containing 5wt% colorless fluorescent powder.
S5, placing the printing stock under a UV lamp with the power of 6500W for irradiation, curing the invisible ink under the irradiation of ultraviolet light to form an invisible variable two-dimensional code, namely an invisible code, and controlling the thickness of the invisible code to be 3 mu m.
S6, coating UV varnish on the invisible codes (comprising the polyacrylate layer which is not covered by the invisible codes and is exposed) by an offset press according to the amount of 6g/m 2; and then the printing stock is irradiated under a 4000W UV lamp, so that the UV varnish is solidified to form a varnish layer, the area of the varnish layer is controlled to be larger than that of the polyacrylate layer, and the polyacrylate layer is completely covered.
Wherein, the UV varnish contains 1 weight percent of ultraviolet resistant agent; the anti-ultraviolet agent is specifically benzophenone UV-531.
Performance detection
Taking the invisible codes obtained in examples 1-13 and comparative examples to detect the wear resistance; the results of the measurements are shown in Table 2.
And (3) abrasion resistance detection:
1. Adopting a printed matter wear-resisting tester conforming to GB/T7706-2008 to detect wear resistance; wherein: the friction speed is controlled to be 45 times/min, and the one-way travel is controlled to be 60mm; the load is controlled to be 20N; the size of the invisible codes is 5cm multiplied by 5cm.
2. And repeatedly rubbing the invisible codes through the printed matter wear-resisting tester until the information of the invisible codes cannot be read, and recording the rubbing times. The more the friction times are, the better the wear resistance of the invisible codes is represented; conversely, the fewer the number of rubs, the poorer the wear resistance that represents the covert code.
TABLE 2 wear resistance of the invisible codes obtained in examples 1 to 13 and comparative examples
| Project | Number of rubs/times |
| Example 1 | 428 |
| Example 2 | 441 |
| Example 3 | 456 |
| Example 4 | 450 |
| Example 5 | 445 |
| Example 6 | 452 |
| Example 7 | 453 |
| Example 8 | 455 |
| Example 9 | 453 |
| Example 10 | 454 |
| Example 11 | 455 |
| Example 12 | 453 |
| Example 13 | 452 |
| Comparative example | 339 |
Referring to table 2, it can be seen from the detection results of example 1 and comparative example: example 1, provided with a polyacrylate layer, has significantly better wear resistance for the covert code than the comparative example without a polyacrylate layer. The polyacrylate with the glass transition temperature less than-14 ℃ is dried to form a film (namely, the polyacrylate layer is formed), the film layer is softer and has certain adhesiveness, and the invisible ink is favorably combined on the polyacrylate layer, so that the connection firmness between a printing stock and the invisible ink (namely, the invisible code) can be improved, and the wear resistance of the invisible code is further improved.
Examples 1-5 examined the effect of the glass transition temperature of the polyacrylate on the abrasion resistance of the resulting covert code. From the test results, it can be seen that: as the glass transition temperature of the polyacrylate is reduced, the film layer formed by the polyacrylate becomes softer and the adhesiveness is stronger, so that the adhesion capability of the polyacrylate layer to the invisible ink is stronger, the connection firmness between the invisible code and a printing stock is improved, and the wear resistance of the invisible code is further improved. However, as the glass transition temperature of the polyacrylate is further reduced, the coating of the varnish is affected due to the fact that the adhesiveness of the polyacrylate layer is too high, so that the varnish is unevenly coated, the formed varnish layer is defective, the protection effect of the varnish layer on the invisible codes is further reduced, and the wear resistance of the invisible codes is reduced.
Examples 3,6-13 examined the effect of different control parameters on the wear resistance of the resulting covert code when printed. When the jet printing speed of the invisible ink is 20-50 m/min, the ultraviolet light source power for curing the invisible ink is 6000-7000W, the thickness of the invisible code is 2-4 mu m, the coating weight of the varnish is 5-8 g/m 2, and the invisible code obtained when the ultraviolet light source power for curing the varnish is 3500-4500W has good wear resistance.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
Claims (7)
1. The printing process of the anti-counterfeiting traceable invisible codes is characterized by comprising the following steps of: comprising the following steps:
arranging a carbon black-free ink layer on a printing stock;
providing a polyacrylate layer over the carbon black free ink layer;
Selecting a variable two-dimensional code from a database system and connecting information to be printed with the variable two-dimensional code through software or an operating system;
Spraying invisible ink onto the polyacrylate layer of the printing stock according to the identification array of the variable two-dimensional code;
UV curing is carried out on the invisible ink sprayed on the polyacrylate layer, so that an anti-counterfeiting traceable invisible code is formed;
a transparent protective layer is arranged on the anti-counterfeiting traceable invisible code;
The glass transition temperature of the polyacrylate is-38 to-24 ℃;
the polyacrylate is polymerized by isooctyl acrylate, n-butyl acrylate, methyl methacrylate, 2-ethylhexyl acrylate, acrylamide and acrylic acid;
The invisible ink is sprayed onto a polyacrylate layer of a printing stock through a code spraying device at a spray printing speed of 20-50 m/min, and then the invisible ink is solidified through irradiation of a UV lamp of 6000-7000W, so that the thickness of the anti-counterfeiting traceable invisible code is 2-4 mu m.
2. The printing process of the anti-counterfeiting traceable invisible codes according to claim 1, wherein the printing process comprises the following steps of: the black-free ink is prepared from red black-free ink, blue black-free ink and yellow black-free ink.
3. The printing process of the anti-counterfeiting traceable invisible codes according to claim 2, wherein the printing process is characterized by comprising the following steps of: the mass ratio of the red non-carbon black ink to the blue non-carbon black ink to the yellow non-carbon black ink is 1:1:1.
4. The printing process of the anti-counterfeiting traceable invisible codes according to claim 1, wherein the printing process comprises the following steps of: the transparent protective layer is a glazing oil layer, and the glazing oil is UV (ultraviolet) glazing oil and contains an ultraviolet resistant agent.
5. The printing process of the anti-counterfeiting traceable invisible codes according to claim 4, wherein the printing process comprises the following steps of: the varnish is coated on the anti-counterfeiting traceable invisible codes according to the weight of 5-8 g/m 2, and is cured by irradiation of 3500-4500W of UV lamps.
6. The printing process of the anti-counterfeiting traceable invisible codes according to claim 1, wherein the printing process comprises the following steps of: the polyacrylate layer contains an ultraviolet resistant agent.
7. Color box, its characterized in that: the surface of the anti-counterfeiting traceable invisible code is printed with an invisible code, and the invisible code is printed by adopting the printing process of the anti-counterfeiting traceable invisible code according to any one of claims 1 to 6.
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